I can see two major effects:
1) Lots of the "last screw" manufacturing will move to other countries and then imported into the US. Due to IP concerns it will probably move to countries with good IP protections such as the EU, Canada, Australia, NZ, etc. I can't say much for the other countries but it would be a boon to Canada (longer term anyway, it will be painful in the short term) providing diversification from the natural resource economy that Canada has too much of, and an incentive for the top talent to stop coming down to the US for the most interesting jobs.
2) Except in the case where US production is more than 25% more expensive than offshore, the domestic US industry for these components and raw materials will grow (this is probably Trump's goal). The "last screw" manufacturing that stays within the US will be much more expensive due to the higher input costs.
Since I am inclined to believe that the quantity of talent/expertise for high-tech manufacturing is higher outside the US than in, the effect of #1 will be much larger than the effect of #2. But I could be wrong, the US has pretty fantastic network effects and world-class talent, I wouldn't discount their ability to innovate just yet.